Table 1.

Comparison of Baseline Group Characteristics ^a

	Group 1	Group 2	P Value
Age, y, mean ± SD	26.7 ± 5.8	25.7 ± 6.2	.29
Sex
Female	8.3 (5)	7.7 (4)	.90
Male	91.6 (55)	92.3 (48)
Instability (Gerber b classification)
B2	86.7 (52)	80.8 (42)	.39
B3	13.3 (8)	19.2 (10)
Job
Physically demanding	41.7 (25)	32.7 (17)	.33
Not physically demanding	58.3 (35)	67.3 (35)
Sports
None	26.7 (16)	17.3 (9)	.43
No overhead or contact	18.3 (11)	25 (13)
Contact and/or overhead	55 (33)	57.7 (30)

^aValues are expressed as % (n) unless otherwise noted.

^bGerber and Nyffeler.¹⁵